JP2010076042A - Cutting method and apparatus thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting method and apparatus thereof capable of effectively using the effective blade length of a router end mill by successively changing the contact position of the router end mill with respect to an end face of a workpiece, suppressing abrasion and wear of a blade part of the router end mill, and prolonging the lifetime of a blade. <P>SOLUTION: The cutting apparatus comprises a feed driving unit 8 for moving a spindle 6 in the horizontal direction, and a vertical driving unit 9 for periodically and vertically moving a router end mill E in the axial direction within a range of an effective blade length E<SB>1</SB>while moving the router end mill in the horizontal direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention, for example, a workpiece such as a resin film material or a composite material of a synthetic resin material and a metal material, specifically, a printed circuit board or the like using a router end mill, such as outer shape processing, division processing, cutting processing, slit processing, etc. The present invention relates to a cutting method and apparatus used when cutting an end face of a workpiece.

2. Description of the Related Art Conventionally, as this type of processing apparatus, one having a structure in which a rotating router end mill cuts a workpiece while moving in a horizontal direction is known. Here, the term router end mill generally refers to a cutting tool used in a router machine having a structure that performs external processing by tracing the end face of a printed circuit board. It is expressed as a representative of drills, router bits, end mills, and other processing blades.
JP-A-9-117815 Japanese Patent No. 2601803

  However, in the case of these conventional structures, since the rotating router end mill is a structure that cuts the workpiece while moving in the horizontal direction, the contact position with respect to the end surface of the workpiece of the router end mill is specified as a fixed position, The same fixed position of this router end mill will always be in contact with the work piece, wear and abrasion at the same part of the blade part will easily occur, and the tool life may be shortened. It has the disadvantage of not using it.

  The present invention aims to solve these disadvantages. Among the present inventions, the method invention according to claim 1 is directed to the end face of the workpiece while the rotating router end mill moves in the horizontal direction. A cutting method for cutting, characterized in that the above-mentioned router end mill moves vertically in the range of the effective blade length while moving in the horizontal direction to process the workpiece by periodically moving up and down in the axial direction. is there.

  According to a second aspect of the present invention, there is provided an apparatus according to claim 2, comprising a spindle on which a router end mill can be mounted, and a feed drive unit for moving the spindle in a horizontal direction. The rotating router end mill moves while moving in the horizontal direction. A cutting apparatus for cutting an end face of an object, comprising a vertical drive unit that periodically moves up and down in the axial direction within an effective blade length while moving the router end mill in the horizontal direction. It is in a cutting device.

  According to a third aspect of the present invention, in the router end mill, a shaft-shaped portion is formed at a tip portion of the shank portion, and a notch surface substantially parallel to the rotation axis of the shaft-shaped portion is formed on the outer peripheral surface of the shaft-shaped portion. Formed, a notch surface of the shaft-like portion is formed with a chip discharge groove portion having a substantially V-shaped cross section composed of a rake surface and a discharge surface substantially parallel to the rotation axis, and a clearance surface is formed on the remaining outer peripheral surface of the shaft-like portion. And a cutting edge portion extending substantially parallel to the rotational axis, and the diameter of the shaft-like portion is 6 mm or less. The invention according to claim 5 is characterized in that a rake angle formed by a surface perpendicular to the rotation direction of the shaft-shaped portion and the rake surface is formed at 15 ° to 55 °. The invention according to claim 6 is characterized in that the flank face is rotated around the tip edge of the cutting edge. It is formed by leaving a land surface at a rear position in the rolling direction.

  As described above, according to the present invention, the router end mill is mounted on the spindle, and the rotating spindle is moved in the horizontal direction by the feed driving unit to end the end surface of the workpiece. At this time, the router end mill moves up and down periodically in the axial direction within the range of the effective blade length by the vertical drive unit, and the router end mill moves in the horizontal direction while moving in the range of the effective blade length. The end face of the work piece is cut by moving up and down periodically in the axial direction, and the contact position of the router end mill with respect to the end face of the work piece changes sequentially, and the effective edge length of the router end mill changes. Can be used effectively, wear and abrasion of the blade end of the router end mill can be suppressed, and the blade life can be extended.

  According to a third aspect of the present invention, in the router end mill, a shaft-shaped portion is formed at a tip portion of the shank portion, and a notch substantially parallel to the rotation axis of the shaft-shaped portion is formed on the outer peripheral surface of the shaft-shaped portion. Forming a chip discharge groove portion having a substantially V-shaped cross section consisting of a rake surface and a discharge surface substantially parallel to the rotation axis on the notch surface of the shaft-shaped portion, and a flank on the remaining outer peripheral surface of the shaft-shaped portion Since the cutting edge portion extending substantially parallel to the rotation axis is formed, the workpiece is not lifted by the cutting edge portion, and the chip is reliably discharged by the presence of the notch surface and the chip discharge groove portion. The shape of the workpiece can also be cut reliably without lifting the workpiece, the end surface of the workpiece can be cut smoothly, and the finish surface is good. In addition, the invention according to claim 4 can be performed. In this case, since the diameter of the shaft-shaped portion is 6 mm or less, it is possible to perform fine cutting, and in the invention according to claim 5, the shaft-shaped portion is perpendicular to the rotation direction of the shaft-shaped portion. Since the rake angle formed between the smooth surface and the rake face is 15 ° to 55 °, the sharpness of the cutting edge can be improved, and in the invention of claim 6, Since the flank is formed leaving the land surface at the position behind the leading edge of the cutting edge in the rotational direction, the durability of the cutting edge can be enhanced by the presence of the land surface.

  1 to 10 show an embodiment of the present invention, FIGS. 1 to 9 show a first embodiment, and FIG. 10 shows a second embodiment.

In the first embodiment shown in FIGS. 1 to 9, E is a router end mill, and a shaft-like portion 2 is formed at the tip of a shank portion 1 that is mounted and fixed on a rotating portion such as a chuck of various machines. The tip portion of the shaft-like portion 2 is formed in a conical shape. In this case, the diameter of the shaft-like portion is 6 mm or less, the diameter is 1.4 mm, and the tip portion of the shaft-like portion 2 is the tip. It is formed in a conical shape with an angle θ = 135 °, and the effective blade length E ₁ (the length with which the blade can be cut) is 6 mm.

  As shown in FIGS. 3, 4, 5, and 6, a notch surface 2 a that is substantially parallel to the rotation axis O of the shaft-shaped portion 2 is formed on the outer peripheral surface of the shaft-shaped portion 2. A chip having a substantially V-shaped cross section formed by notching a surface F perpendicular to the passing rotation direction R, and comprising a rake surface 3a substantially parallel to the rotation axis O and a discharge surface 3b. A discharge groove portion 3 is formed, and a flank 4 is formed on the remaining outer peripheral surface of the shaft-like portion 2 to form a cutting blade portion 5 extending substantially parallel to the rotation axis O. In addition, about the shape of the cutting-blade part 5, it is set as the shape extended substantially parallel to the said rotation axis O, The workpiece W is made into the shape and cutting blade part 5 in which the cutting-blade part 5 extends in parallel with the said rotation axis O. It also means that a shape extending slightly parallel to the rotation axis O so as to have a slight twist angle of about 5 ° or less that is not lifted is included.

  α is a rake angle. As shown in FIG. 6, α is an angle formed by a surface F perpendicular to the rotation direction R of the shaft-like portion 2 and the rake surface 3a. The rake angle α is 15 ° to 55 °. In this case, α = 30 °.

  γ is a clearance angle, and as shown in FIG. 6, an angle formed by a surface S parallel to the rotation direction R of the shaft-like portion 2 and the clearance surface 4, and the clearance angle γ is 15 ° to 55 °. In this case, γ = 30 °.

  In this case, an outer peripheral flank 2b having a flank dimension M of 0.03 mm to 0.06 mm is formed on the remaining outer peripheral surface of the shaft-like portion 2 with respect to the rotation trajectory K of the leading edge of the cutting blade 5. is doing.

  Further, in this case, the flank 4 is formed in the same plane as the rotation locus K at the position behind the leading edge of the cutting edge portion 5 in the rotational direction, and the land surface D has a distance T of about 10 μm to about 30 μm from the leading edge. It is formed to leave behind.

  Reference numeral 6 denotes a spindle which is configured so that the router end mill E can be mounted, and is rotated by a rotation driving unit 7 including a servo motor (not shown). The rotating spindle 6 is controlled with a servo motor and a feeding program. Feed movement control Q is performed by a feed drive unit 8 composed of a part and the like.

A vertical drive unit 9 includes a servo motor and a control unit equipped with a vertical movement program. The router end mill E is continuously moved in the axial direction within the effective blade length E ₁ of the router end mill E. Alternatively, the vertical movement control C is performed periodically with a discontinuous period and wave height. However, as shown in FIGS. 1 and 2, the rotating router end mill E moves in the horizontal direction, and the effective blade length E _{1 of} the router end mill E is moved. with a periodically moves up and down in the axial direction within the range, the waveform of the wave height H in the period Tn and the effective cutting edge length range of E ₁ which defines the processing conditions, the form of the wave motion moves horizontally and vertically The end surface W ₁ of the workpiece W is cut.

Since the first embodiment of the present embodiment has the above-described configuration, the router end mill E is mounted on the spindle 6 and the rotating spindle 6 is moved in the horizontal direction by the feed driving unit 8 so that the end surface W ₁ of the workpiece W is moved. At this time, the router end mill E is periodically moved up and down in the axial direction within the range of the effective blade length E ₁ by the vertical drive unit 9, and the router end mill E moves in the horizontal direction. However, the end surface W ₁ of the workpiece W is periodically moved up and down in the axial direction within the range of the effective blade length E ₁ to cut the end surface W ₁ of the workpiece W. Therefore, the end surface of the workpiece W of the router end mill E The contact position with respect to W ₁ changes sequentially, the effective blade length E ₁ of the router end mill E can be used effectively, the wear and wear of the blade portion of the router end mill E can be suppressed, and the tool life is extended. Can Kill.

At this time, in the router end mill E, the shaft-shaped portion 2 is formed at the tip of the shank portion 1, and the notch surface 2 a substantially parallel to the rotation axis O of the shaft-shaped portion 2 is formed on the outer peripheral surface of the shaft-shaped portion 2. The notch surface 2a of the shaft-shaped portion 2 is formed with a chip discharge groove portion 3 having a substantially V-shaped cross section composed of a rake surface 3a and a discharge surface 3b substantially parallel to the rotation axis O, and the outer periphery of the remaining portion of the shaft-shaped portion 2 Since the flank 4 is formed on the surface and the cutting edge portion 5 extending substantially parallel to the rotational axis O is formed, the workpiece W is not lifted by the cutting edge portion 5, and the notch surface 2a and the chips are removed. Chips can be reliably discharged by the presence of the discharge groove 3, and the shape of the workpiece W can be reliably cut without lifting the workpiece W, and the end surface W ₁ of the workpiece W can be Cutting with smooth finish and good finish Ukoto can.

  Further, in this case, since the diameter of the shaft-shaped portion 2 is 6 mm or less, it is possible to perform fine cutting, and in this case, the surface F perpendicular to the rotation direction R of the shaft-shaped portion 2 and the above-mentioned Since the rake angle α formed between the rake face 3a and the rake face 3a is 15 ° to 55 °, the sharpness by the cutting edge portion 5 can be improved, and in this case, the flank 4 is connected to the cutting edge portion. Since the land surface D is left behind in the rotational position of the tip edge of the tip 5 in the rotational direction, the durability of the cutting blade portion 5 can be enhanced by the land surface D.

  FIG. 10 shows a second embodiment of the present invention. In this case, as compared with the first embodiment, the clearance dimension M gradually increases as the clearance surface 4 and the outer peripheral clearance surface 2b reach in the rotational direction. Is formed into a shape.

  Even in the second embodiment, the same effects as those in the first embodiment can be obtained.

  The present invention is not limited to the above embodiment, and the shape of the router end mill E, the shape and size of the spindle 6, the feed drive unit 8, and the vertical drive unit 9 are appropriately designed and changed.

  As described above, the intended purpose can be sufficiently achieved.

It is a partial side view of the processing state of the first embodiment of the present invention. It is an explanatory side view of the processing state of the first embodiment of the present invention. 1 is a perspective view of an end mill according to a first embodiment of the present invention. It is a partial front view of the end mill of the first embodiment of the present invention. It is a partial side view of the end mill of the first embodiment of the present invention. It is sectional drawing of the end mill of the example of 1st Embodiment of this invention. 1 is a perspective view of an end mill according to a first embodiment of the present invention. 1 is a perspective view of an end mill according to a first embodiment of the present invention. It is a perspective view of the processing state of the first embodiment of the present invention. It is sectional drawing of the end mill of the 2nd embodiment of this invention.

Explanation of symbols

E Router end mill O Rotating axis R Rotating direction F Vertical surface W Workpiece α Rake angle D Land surface E ₁ Effective blade length W ₁ End face 1 Shank part 2 Shaft part 2a Notch face 3 Chip discharge groove part 3a Rake face 3b Discharge Surface 4 Flank 5 Cutting edge 6 Spindle 8 Feed drive 9 Vertical drive

Claims (6)

  In the cutting method in which the rotating router end mill moves in the horizontal direction while cutting the end face of the workpiece, the router end mill moves in the axial direction periodically within the range of the effective blade length while moving in the horizontal direction. Then, a cutting method characterized by processing a workpiece.   In a cutting device that comprises a spindle on which a router end mill can be mounted, and a feed drive unit that moves the spindle in the horizontal direction, and the rotating router end mill moves in the horizontal direction while cutting the end surface of the workpiece. A cutting apparatus comprising a vertical drive unit that moves the router end mill in the horizontal direction and moves it vertically in the axial direction within the range of the effective blade length.   The router end mill has a shaft-shaped portion formed at the tip of the shank portion, and a notch surface substantially parallel to the rotation axis of the shaft-shaped portion is formed on the outer peripheral surface of the shaft-shaped portion. A chip discharge groove portion having a substantially V-shaped cross section composed of a rake surface and a discharge surface substantially parallel to the rotation axis is formed, and a relief surface is formed on the remaining outer peripheral surface of the shaft portion to extend substantially parallel to the rotation axis. The cutting apparatus according to claim 2, wherein a cutting edge portion is formed.   4. The cutting apparatus according to claim 3, wherein the shaft portion has a diameter of 6 mm or less.   The cutting apparatus according to claim 3 or 4, wherein a rake angle formed by a surface perpendicular to the rotation direction of the shaft-shaped portion and the rake surface is formed at 15 ° to 55 °. The cutting apparatus according to any one of claims 3 to 5, wherein the flank is formed by leaving a land surface at a position rearward in the rotational direction of the tip edge of the cutting edge portion.

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